Means for feeding fuel to combustion-chambers



V. ZVCARACRISTI.

MEANS'FOR FEEDING FUEL T0 COMBUSTION CHAMBERS.

. APPLICATION FILED JAN- 27,1915. 1,336,125.

Patented Apr. 6, 1920.

WITNESSES:

R 1 L m /J v m) m 5 w m m G m V HIS ATTORNEY UNITED STATES TATENT OFFTCE.

VIRGINIUS Z. GARACRISTI, OF BRONXVILLE, NEW YORK, ASSIGNOR TO LOCOMOTIVE PULVERIZED FUEL COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAW ABE.

Specification of Letters Patent.

Patented Apr. 6, 1920.

Application filed January 27, 1915. Serial No. 4,691.

To all? wkom it may concern:

Be it known that I, VIRGINIUS Z. CARA- onrsrr, a citizen of the United States, and a resident of Bronxville, in the county of ll'estchester and State of New York, have invented certain new and useful improvements in Means for Feeding Fuel to Com bustionihambers, of which the following is a specification.

This invention relates to improvements in means for feeding fuel to combustion chamsers, and has for its object to provide an improved construction by which the maximum amount of travel in the minimun'i amount space is obtained, after which the fuel and air mixture under combustion is subjected to further combustion in a manner heretofore well known. My improved fuel feeder is adapted for use in metallurgical furnaces, steam generators, and .other similar uses.

With these and other objects in view, my invention consists of the novel features, construction and arrangement of parts, hereinafter more fully described and pointed out in the claims.

In the drawings,

Figure 1 is a vertical longitudinal section of the improved apparatus, in this case applied to a small forging furnace;

Fig. 2 is a vertical section taken on the line 22 of Fig. 1; and

Fig. 3 is a vertical section of a slightly modified form of construction.

Similar reference characters indicate corresponding parts throughout the several views.

Referring to the drawings, and more particularly to Fig. 1 thereof, a small furnace 10 substantially rectangular in shape, or which may be of another shape more adapted to its particular use, is provided with a chimney 12, in a manner well known.

In the front portion 15 of the furnace, a combustion chamber 16 18 provided, which 15 circular in cross-section, as lndicated by 17 in Fig. 2, the diameter of the circularcrosssection being smaller by almost onehalf of the height of the furnace 10 at the forward portion 18 thereof. This is the case in the embodiment shown, but changes in the relative proportions may be made, depending upon the capacity or particular use of the furnace, generator or the likd. The combustion chamber 16 is elongated in the nel 22., the'lower wall 23 of which is formed. v tangential with the circular inner surface -17 of the said chamber.

Frojecting into the said channel 22 is a feeding nozzle 25 supported on trunnions 26 by a shaft, the said shaft being provided at one end with manipulating handle 28. Tie feeding nozzle issupplied at its rear portion 29 with fuel and air in suitable proportions, the said air being acurrent of high velocity, the said fuel being in the forrii of pulverized coal or oil or other suitable material, and as the same is fed into the furnace through the said nozzle 25, it is directed tangential to the inner surface of the said combustion chamber, and in a direction along the length thereof, from the front wall 20 to the other end 30, and into the furnace 10. As the nozzle 25 is inclined in relation to the axis of the combustion chamher, the stream of fuel and air is directed therethrough in a spiral or helical path of greater or less length according. to the lateral and longitudinal inclination of the nozzle to the axis of the furnace, that is, the inclination in a plane passed through the axis, and in a plane perpendicular to the axis, respectively. So, when the nozzle is directed at a greater angle in relation to the axis of the combustion chamber, the number of convclutions will be larger than when the angle of the nozzle is less. Referring to Fig. 1, it will be noticed that the mixed fuel and air, entering the combustion chamber, owing to its incoming velocity from the nozzle 25, takes the helical path indicated by the dotted line 31, until it passes out of the end 30 into the chamber 10, where, owing to its not being cloosely confined, the products of combustion pass through the furnace, which is of larger volume than the combustion chamber, in the usual manner.

A longitudinal channel or trougn 32 is provided in the bottom of the combustion chamber 16 for the portion of its length bea In the modified form shown in Fi 3, there is no lon 'tudinal channel provided,- the surface of t e chamber being unbroken be nd the nozzle openin mm the above it will be seen that the combustion chamber is adapted to contain a long stream of fuel by reason of the con-- Y volutions, which the stream must take within the combustion chamber, due to its velocity audits tendency to hug the wall. As different fuels and fuels under different condithus require a different element of time for combustion,

' combustion chamber in a and satisfactory forms of my invention,;but

it is obvious that changes may be made therein, without departing from the spirit and scope. thereof, as defined 'in the append-- ed claims. I

I.claim:-

'1. In alfurnace, a main chamber and a. preliminary combustionchamber having an open end opening directly into the main chamber, said preliminary combustion chamber extending horizontally from the main .chamber with its remote end closed, a nozzle opening into said combustion chamber and inclined both laterally and longitudinally to the axis of said combustion chamber, and means for supplying said nozzle at a point spaced from its mouth with fuel and with a current of air, the said lateral angle of said nozzle being so large that the said current of air and the fuel are caused to impinge upon the. said wall along the length of the helical path tangentially to the wallbefore the combustion ,a combustion chamber of said fuel has been completed.

2. In a device of the character described, having an inner wall ha a circularcross section, means for injecting fuel at a high velocity tangential to said inner wall, and at an inclination to ,a helical path within said w mg the inclination of said tion of sai the axis of said chamber to give the same a ,and means for changing the inclination of ingmeans.

3. In a device of the character described, a combustion chamber having a circular inner surface and provided 'Wlth an opening tangential to-said inner surface, means in said opening for directing fuel at a high velocity in a ath inclined to the axis of said chamber and tangential to said inner surface, and a means for changing the angle of inclination of said directing means.

said injectj 4. In a device of the character described,

a combustion chamber having an inner wall havin a circular cross section, means for injecting fuel in a path inclined to the axis of said wall, and substantially tangentially to said inner wall, to give the same a helical ath within said wall and means for changinjecting means, means in said wall for receiving the falling products of combustion and-means for removing said fallen products of combustion.

5. In a furnace, a main chamber and a preliminary combustion chamber having an open end chamber, said prellminary combustion chamber extending horizontally fromthe-main chamber with-its remote end closed, a nozzle o ening into said combustion chamber and inclined both laterally and longitudiopening directly into the main nally to the axis of said combustion chamber, and means for supplyin 7 said nozzle at a point spaced from its mout withfuel and with a current of air, the said lateral angle of said nozzle bein so large that the said current of air and t e fuel are caused to impinge'upon the said wall along the length of the combustion chamber in a helical path tangentialliy to the wall before the combusfuel has been completed, the said nozzle having a substantiallystraig'ht axis,

- said current of air and of fuel being directed in the said nozzle in a substantiall straight 7 line path until they emerge into sai chamber. In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

' VIRGINIUS z. CARAGRISTI.

'Witnesses:

G. E. Fnonimi, EMILY L. Mums. 

